fix(deps): update dependency phpstan/extension-installer to v1.4.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
phpstan/extension-installer	1.4.0 -> 1.4.1

---

Release Notes

phpstan/extension-installer (phpstan/extension-installer)

### [`v1.4.1`](https://togithub.com/phpstan/extension-installer/releases/tag/1.4.1) [Compare Source](https://togithub.com/phpstan/extension-installer/compare/1.4.0...1.4.1) - [f6b87fa](http://github.com/phpstan/extension-installer/commit/f6b87faf9fc7978eab2f7919a8760bc9f58f9203) - Test more Composer versions - [4ce4d5c](http://github.com/phpstan/extension-installer/commit/4ce4d5cfb44b4d4fa14b46917ce5e74e4e04abbd) - Revert "Bump composer-plugin-api"

---

Configuration

📅 Schedule: Branch creation - "before 4am on Monday" (UTC), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• [ ] If you want to rebase/retry this PR, check this box

---

This PR has been generated by Mend Renovate. View repository job log here.